Stay-bolt structure



?atented @et i923.,

@i un f'" Y'G SSGNOR TG FLANNERY BOLT ORPRATN OF DELAWARE.

stray-nona* srnucrunn.

Application led February 1, 19217. Serial No. $45,456.

To all whom t may concern.'

Be it known that l, ETHAN l. Dones, a citizen of the United States, and a resident et Central Valley, in the county ot Orange and State ot New York, have invented certain new and useful improvements in Stay- Bolt Structures; and I do hereby declare the iollowing'to be a full, clear, and exact description of the invention, such as will enable others skilled. in the art to which it appertains to make and use the same.

'My invention relates to an improvement in staybolt construction, the object being to provide improved means for securing the link type of bolt to the outer sheet et the boiler and it consists in the details of construction as will be more i'ully described and pointed out in the claims.

The accompanying drawing is a sectional view showing an embodiment of my invention.

The link bolt consists oi a shank 5 and a head 6 the former ot which is provided with an elongated eye or loop 7 and the latter with an elongated loop 8, the end members 9 and 10 respectively of the loops of the shank and head passing through the loop oit the other member in the manner of a chain link thus forming a universal connection between the bolt shank and head which will permit either to move freely with relation to the other so as to accommodate itself to the movement of the boiler sheet to which it may be connected. These links are connected by hammering or forging in the same manner as chain links and the free end of the shank is adapted to be threaded tor attachment to the inner sheet of the boiler in the usual and well known manner.

The outer sheet l0 of the boiler is provided with a. bolt opening, which is made conical and curved in the arc oi a circle with its greatest diameter at the topV to receive the bolt bearing member lli which, in effect, 'terms part of the end structure and is externally the segment of sphere corresponding) in diameter and shape with the curved olt opening. rlhis bolt bearing member is provided centrally with a conical opening to receive the head 6. rlhe head 6 may be solid, but I prefer to provide it with a central threaded opening 1l normally closed by the screw plug or cap 12, which when in place forms a steam tight joint and prevents the escape of any steam.

I have shown the head as flush with the outer surface of the sheet l0 but this is not essential, as it may project outside the sheet or terminate between the inner outer surface ot the sheet, the principal feature there` ot' being that it is conical and of' such size that it cannot pass through the bolt opening in the sheet.

rlhe looped end ot shank 5 is ot less diameter than the smallest diameter of the bolt opening so that it may be passed there-- through in assembling the parts, which latter is done by passing the shank 5 through the bolt opening and screwing it to the inm ner sheet (not shown) by turning the head 6. fitter the shank has been screwed home so that there is no slack between the head 6 and the shank 5, and the former is firmly seated, it is permanently secured to the sheet by welding.

The bolt bearing member can be initially adjusted 4so that the long axis of the head will be coincident with the long axis of the shank of the bolt 5, thus specially adapting the latter for use or in positions where the bolt is oblique to the boiler sheets.

Alter the parts have been properly assembled in the boiler sheets, the bearing member le and head 6 are permanently secured by welding them both asat l5 to the boiler sheet l0, thus preventing any movement ol' the bearing member in the outer sheet or any movement ot the head in the bearing member, and also forming a steam tight joint between the head and the bearing member and between the latter and the sheet 10.

it is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of my invention hence l would have it understood that l do not wish to confine myself to the construction and arrangement of parts shown and described but,

Having "fully described my invention what l claim as new and desire to secure by Letters-Patent, is

l. ln a stay bolt construction, the combination of a two part bolt consisting of a shank and a headV connected by a link joint the outer end of the head being conical, a boiler sheet having a bolt hole the wall of which is in the segment of a sphere, and a bolt bearing member formed in the arc of a g shankV and a head connected byra link jointVK circle and initially adustable in the open# ing for the bolt, the said bolt bearing niember and conical head being Welded together and also to the sheet. n

2. In -a vstaybolt construction, the combination of ya two. part bolt consisting` of a the outer end of the head meinberofthe bolt being conical7 a boileivsheet having'a bolt hole the Wall of' Vwhich is lin the segment of a sphere and a bolt bearing member y iformed in the are of a circle and initially adjustablev inthe'openingr 'for the bolt and provided with a conical seatfor the conical Y outer end of the head member of the bolt-, the said boltbeaiing member and conical head being Welded togethergand also tothe outer sheetfof the boiler. g

ln testimony whereof, I have'signed this specification Vin the presence of alsubsc'rib- 20 ing Witness. Y Y Y -ETHAN DODDS. A Witness: V v

EDWIN SQRYCE. 1 Y 

